Łęczyca Land (Polish: ziemia łęczycka; Latin: Terra Lanciciensis) is a historical region in central Poland, a part of Łęczyca-Sieradz Land (Polish: ziemia łęczycko-sieradzka).
Its historical capital is Łęczyca, while the largest city is Łódź, while other bigger cities are Zgierz, and Tomaszów Mazowiecki (partly in Sieradz Land).
Mazovia or Masovia (Polish: Mazowsze [maˈzɔfʂɛ] ) is a historical region in mid-north-eastern Poland. It spans the North European Plain, roughly between Łódź and Białystok, with Warsaw being the largest city and Płock being the capital of the region. Throughout the centuries, Mazovia developed a separate sub-culture featuring diverse folk songs, architecture, dress and traditions different from those of other Poles.
Historical Mazovia existed from the Middle Ages until the partitions of Poland and consisted of three voivodeships with the capitals in Warsaw, Płock and Rawa. The main city of the region was Płock, which was even capital of Poland from 1079 to 1138; however, in Early Modern Times Płock lost its importance to Warsaw, which became the capital of Poland. From 1138, Mazovia was governed by a separate branch of the Piast dynasty and when the last ruler of the independent Duchy of Mazovia died, it was fully incorporated to the Polish Crown in 1526. During the Polish–Lithuanian Commonwealth over 20% of Mazovian population was categorized as petty nobility. Between 1816 and 1844, the Mazovian Governorate was established, which encompassed the south of the region along with Łęczyca Land and south-eastern Kuyavia. The former inhabitants of Mazovia are the Masurians, who since the Late Middle Ages settled in neighboring southern Prussia, a region later called Masuria, where they converted to Protestantism in the Reformation era, thus leaving Catholicism, to which their relatives from Mazovia still adhered.
Łęczyca (pronounced [wɛnˈt͡ʂɨt͡sa]; in full the Royal Town of Łęczyca, Polish: Królewskie Miasto Łęczyca; German: Lentschitza; Yiddish: לונטשיץ, romanized: Lintshits, Luntshits) is a town of 13,587 inhabitants in central Poland. Situated in the Łódź Voivodeship, it is the county seat of the Łęczyca County. Łęczyca is a capital of the historical Łęczyca Land.
The last will and testament of the Piast duke Bolesław III Wrymouth of Poland, established rules for governance of the Polish kingdom by his four surviving sons after his death. By issuing it, Bolesław planned to guarantee that his heirs would not fight among themselves, and would preserve the unity of his lands under the Piast dynasty. However, soon after his death his sons fought each other, and Poland entered a period of fragmentation lasting about 200 years.
Sieradz Land (Polish: ziemia sieradzka; Latin: Terra Siradiae) is a historical region in central Poland, a part of Łęczyca-Sieradz Land (Polish: ziemia łęczycko-sieradzka).
Its traditional capital is Sieradz, while other bigger cities are Piotrków Trybunalski (another historically important locality), Radomsko, Tomaszów Mazowiecki (partly in Łęczyca Land), Bełchatów, Zduńska Wola, and Pabianice (a suburb of Łódź).
Kalisz Region (Polish: Kaliskie) is a historical and ethnographical region in central Poland, located mainly in the Greater Poland Lakes Area and South Greater Poland Plain. It forms the eastern part of the historic region of Greater Poland.
Kalisz Region encompasses the area of the former Kalisz Voivodeship, south of Lake Gopło as well as Wieluń Land. In the north it borders Kuyavia, in the south it borders Lower Silesia, in the west it borders Poznań Region and in the east it borders with Sieradz Land and Lęczyca Land.